This upgraded Spring mattress features motion-reducing Response™ Encased Coils for all-over comfort, and a reinforced foam center third for targeted back and core support. The StableEdge Pro™ increases durability, while the knit cover with MoistureProtect™ helps to keep you cool, and Surface-Guard Technology™ keeps the mattress protected. Also available in faux Eurotop and pillowtop, in a soft, medium, or firm feel. Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Antimicrobial, Cushioning Layer, Foam Layer, Non-Toxic, Full Support Additional Information: Suitable for Adjustable Bed Frames Coil Count: 392 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 12 Height/Inches, 74 Length/Inches, 38 Width/Inches Maximum Weight Limit: 500 Lbs Base Material: 100% Polypropylene Comfort Type: Medium Mattress + Box Spring Measurements: 21 Height/Inches Care: Spot Clean Certifications And Listings: Cpsc - 16 Cfr 1632 Compliant, Certipur-Us Certified, Cpsc - 16 Cfr 1633 Compliant Country of Origin: Imported This product is responsibly packaged or labeled using recycled, alternative materials, or items designed to reduce future environmental impact. Set includes mattress plus box spring/foundation. King and Cal. King mattress sets feature 2-piece side-by-side foundations for easier navigation in tight spaces. This mattress meets the requirements of 16CFR Part 1632 (federal flammability (open flame) standard for mattresses and mattress pads This mattress meets the requirements of 16CFR Part 1633 (federal flammability (open flame) standard for mattress sets) when used with foundation